Queen of the Night is such a beautiful card, I adore her. Her effects are kinda subpar but the name / art <3 Unfortunately I don't think a Flower Princess deck is ideal for summoning her, though. You'd probably be better off using Hieratics, Blue-Eyes or Gimmick Puppet because in a plant deck she's not much easier to summon than Sophia, Goddess of Rebirth :'( I'd like to help you with the deck but I don't think there's anything that could make it at all consistent.